1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.documentsui.picker; 18 19 import android.app.Activity; 20 import android.content.ContentResolver; 21 import android.content.ContentValues; 22 import android.database.Cursor; 23 import android.net.Uri; 24 import android.os.FileUtils; 25 import android.util.Log; 26 27 import com.android.documentsui.base.DocumentStack; 28 import com.android.documentsui.base.Shared; 29 import com.android.documentsui.base.State; 30 import com.android.documentsui.roots.ProvidersAccess; 31 32 import java.io.IOException; 33 34 import javax.annotation.Nullable; 35 36 /** 37 * An interface that stores the last accessed stack of the caller 38 */ 39 public interface LastAccessedStorage { 40 getLastAccessed( Activity activity, ProvidersAccess providers, State state)41 @Nullable DocumentStack getLastAccessed( 42 Activity activity, ProvidersAccess providers, State state); 43 setLastAccessed(Activity activity, DocumentStack stack)44 void setLastAccessed(Activity activity, DocumentStack stack); 45 setLastAccessedToExternalApp(Activity activity)46 void setLastAccessedToExternalApp(Activity activity); 47 create()48 static LastAccessedStorage create() { 49 return new RuntimeLastAccessedStorage(); 50 } 51 52 class RuntimeLastAccessedStorage implements LastAccessedStorage { 53 54 private static final String TAG = "LastAccessedStorage"; 55 RuntimeLastAccessedStorage()56 private RuntimeLastAccessedStorage() {} 57 58 @Override getLastAccessed( Activity activity, ProvidersAccess providers, State state)59 public @Nullable DocumentStack getLastAccessed( 60 Activity activity, ProvidersAccess providers, State state) { 61 final String packageName = Shared.getCallingPackageName(activity); 62 final Uri resumeUri = LastAccessedProvider.buildLastAccessed(packageName); 63 final ContentResolver resolver = activity.getContentResolver(); 64 Cursor cursor = resolver.query(resumeUri, null, null, null, null); 65 try { 66 return DocumentStack.fromLastAccessedCursor(cursor, 67 providers.getMatchingRootsBlocking(state), activity); 68 } catch (IOException e) { 69 Log.w(TAG, "Failed to resume: ", e); 70 } finally { 71 FileUtils.closeQuietly(cursor); 72 } 73 74 return null; 75 } 76 77 @Override setLastAccessed(Activity activity, DocumentStack stack)78 public void setLastAccessed(Activity activity, DocumentStack stack) { 79 String packageName = Shared.getCallingPackageName(activity); 80 LastAccessedProvider.setLastAccessed(activity.getContentResolver(), packageName, stack); 81 } 82 83 @Override setLastAccessedToExternalApp(Activity activity)84 public void setLastAccessedToExternalApp(Activity activity) { 85 final String packageName = Shared.getCallingPackageName(activity); 86 final ContentValues values = new ContentValues(); 87 values.put(LastAccessedProvider.Columns.EXTERNAL, 1); 88 activity.getContentResolver().insert( 89 LastAccessedProvider.buildLastAccessed(packageName), values); 90 } 91 } 92 } 93